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Finding the Fourth Proportional to 64,642.88, 96,944.88 and 42,455.36

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Solution

The fourth proportional to 64,642.88, 96,944.88 and 42,455.36 is: 63,670.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,642.88 : 96,944.88 = 42,455.36 : x
  2. Step 2: Convert to fraction form
    64,642.88/96,944.88 = 42,455.36/x
  3. Step 3: Cross multiply
    64,642.88x = 96,944.88 × 42,455.36
  4. Step 4: Simplify right side
    64,642.88x = 4,115,829,780.56
  5. Step 5: Solve for x
    x = 4,115,829,780.56/64,642.88
  6. Step 6: Final answer
    x = 63,670.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.